https://bugzilla.kernel.org/show_bug.cgi?id=42755 Summary: KVM is being extremely slow on AMD Athlon64 4000+ Dual Core 2.1GHz Brisbane Product: Virtualization Version: unspecified Kernel Version: 3.2.2 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm AssignedTo: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx ReportedBy: sandikata@xxxxxxxxx Regression: No Hello. Kvm seems to be broken on AMD Athlon64 4000+ Dual Core 2.1GHz Brisbane. A kernel build takes over 2 hours, compared to 15 minutes on the host. I'm running with virtio for storage, and this does not seem to be related to IO. A simple test with dd also demonstrates that the problem is cpu-ralated: Host test: dd if=/dev/zero of=/dev/null bs=1k count=8M 8388608+0 записей считано (read) 8388608+0 записей написано (write) скопировано (copyed) 8589934592 байта (8,6 GB), 7,04456 c, 1,2 GB/c This also does not seem to be a cpu bug, as both VirtualBox and VMware work fine. Vmware/Virtualbox test: dd if=/dev/zero of=/dev/null bs=1k count=8M 8388608+0 записей считано (read) 8388608+0 записей написано (write) скопировано (copyed) 8589934592 байта (8,6 GB), 5,02745 c, 1,7 GB/c I've tried different kernels on host, between 2.6.22 and current git, with the same results. The guest is running Gentoo Hardened kernel 3.2.2 , but I could try with a an other distro and a vanilla kernel if required. My kvm version is kvm 1.0 Help would be much appreciated. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug.-- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
